kvm: emulating exchange as write ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/x86.c:357! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 11852 Comm: syz-executor0 Not tainted 4.20.0+ #395 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:357 Code: 45 10 50 e8 99 19 7f 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 97 b9 75 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 89 fd 41 54 RSP: 0018:ffff88808c5d72b0 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff8880561f3810 RCX: ffffc90005fda000 RDX: 0000000000000495 RSI: ffffffff810bfd19 RDI: 0000000000000007 RBP: ffff88808c5d72b0 R08: ffff88805918e100 R09: ffff888099499000 R10: ffffed10132933ff R11: ffff888099499fff R12: 1ffff110118bae5a R13: ffff88808c5d7370 R14: ffff88808c5d72f0 R15: 0000000000000000 kobject: 'loop5' (000000006e970830): kobject_uevent_env FS: 00007fc5670c6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc567083db8 CR3: 00000000987b4000 CR4: 00000000001426f0 Call Trace: vmcs_clear arch/x86/kvm/vmx/ops.h:185 [inline] loaded_vmcs_init+0xd2/0x340 arch/x86/kvm/vmx/vmx.c:565 kobject: 'loop5' (000000006e970830): fill_kobj_path: path = '/devices/virtual/block/loop5' alloc_loaded_vmcs+0x7c/0x170 arch/x86/kvm/vmx/vmx.c:2442 vmx_create_vcpu+0x2b8/0x27ae arch/x86/kvm/vmx/vmx.c:6724 kvm_arch_vcpu_create+0xe5/0x220 arch/x86/kvm/x86.c:8712 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2560 [inline] kvm_vm_ioctl+0x526/0x2030 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3089 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 kobject: 'loop3' (0000000059af6b32): kobject_uevent_env kobject: 'loop3' (0000000059af6b32): fill_kobj_path: path = '/devices/virtual/block/loop3' ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc5670c5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 kobject: 'loop1' (00000000746d0334): kobject_uevent_env RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000007 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc5670c66d4 R13: 00000000004c063a R14: 00000000004d1e30 R15: 00000000ffffffff Modules linked in: ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/x86.c:357! invalid opcode: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: 7900 Comm: syz-executor4 Tainted: G D 4.20.0+ #395 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:357 Code: 45 10 50 e8 99 19 7f 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 97 b9 75 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 89 fd 41 54 RSP: 0018:ffff8880ae607b98 EFLAGS: 00010006 RAX: ffff8880859fa540 RBX: ffff888055cbb810 RCX: 1ffff11015cc0f7b RDX: 0000000000010000 RSI: ffffffff810bfd19 RDI: 0000000000000007 RBP: ffff8880ae607b98 R08: ffff8880859fa540 R09: ffffed1015cc5ba8 R10: ffffed1015cc5ba8 R11: ffff8880ae62dd47 R12: 1ffff11015cc0f77 R13: ffff8880ae607c58 R14: ffff8880ae607bd8 R15: ffff8880ae607d18 FS: 00000000013a9940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880ae607bd8 CR3: 000000008802f000 CR4: 00000000001426f0 Call Trace: vmcs_clear arch/x86/kvm/vmx/ops.h:185 [inline] loaded_vmcs_init+0xd2/0x340 arch/x86/kvm/vmx/vmx.c:565 __loaded_vmcs_clear+0x2be/0x510 arch/x86/kvm/vmx/vmx.c:632 flush_smp_call_function_queue+0x1d2/0x640 kernel/smp.c:243 generic_smp_call_function_single_interrupt+0x13/0x2b kernel/smp.c:192 smp_call_function_single_interrupt+0x12f/0x650 arch/x86/kernel/smp.c:296 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0xd0 kernel/locking/spinlock.c:184 Code: f0 4a 72 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 28 48 83 3d d8 d8 8c 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb ad e8 ac 0b 1b f9 eb bb 0f 0b 0f 0b e8 ea 28 e0 RSP: 0018:ffff88808d9879c8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 RAX: dffffc0000000000 RBX: 0000000000000286 RCX: ffffffff8187d65a RDX: 1ffffffff12e495e RSI: ffffffff8187d674 RDI: 0000000000000286 RBP: ffff88808d9879d8 R08: ffff8880859fa540 R09: ffffed1015cc4ba8 R10: ffffed1015cc4ba8 R11: ffff8880ae625d43 R12: ffff8880ae625d40 R13: ffff8880ae625dc0 R14: ffff88808d987ce0 R15: ffff8880ae625d40 unlock_hrtimer_base kernel/time/hrtimer.c:878 [inline] hrtimer_start_range_ns+0x6c4/0xe00 kernel/time/hrtimer.c:1109 hrtimer_start_expires include/linux/hrtimer.h:409 [inline] do_nanosleep+0x1c0/0x750 kernel/time/hrtimer.c:1676 hrtimer_nanosleep+0x2d4/0x620 kernel/time/hrtimer.c:1733 __do_sys_nanosleep kernel/time/hrtimer.c:1767 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline] __x64_sys_nanosleep+0x1e7/0x280 kernel/time/hrtimer.c:1754 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4834b0 Code: 00 00 48 c7 c0 d4 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb be 66 0f 1f 44 00 00 83 3d c1 2f 5d 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 f8 f8 ff c3 48 83 ec 08 e8 ba 70 fd ff RSP: 002b:0000000000a4fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 00000000000406a3 RCX: 00000000004834b0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a4fd80 RBP: 000000000000024b R08: 0000000000000001 R09: 00000000013a9940 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000c R13: 0000000000040561 R14: 0000000000000040 R15: 0000000000000004 Modules linked in: ---[ end trace ddf99965e673c3b7 ]--- RIP: 0010:kvm_spurious_fault+0x9/0x10 arch/x86/kvm/x86.c:357 Code: 45 10 50 e8 99 19 7f 00 58 5a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 e8 97 b9 75 00 <0f> 0b 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 89 fd 41 54 RSP: 0018:ffff88808c5d72b0 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff8880561f3810 RCX: ffffc90005fda000 RDX: 0000000000000495 RSI: ffffffff810bfd19 RDI: 0000000000000007 RBP: ffff88808c5d72b0 R08: ffff88805918e100 R09: ffff888099499000 R10: ffffed10132933ff R11: ffff888099499fff R12: 1ffff110118bae5a R13: ffff88808c5d7370 R14: ffff88808c5d72f0 R15: 0000000000000000 FS: 00000000013a9940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880ae607bd8 CR3: 000000008802f000 CR4: 00000000001426f0